You bought a monstera with big, lush leaves and gorgeous splits. Six months later, the new leaves coming in are solid. Small. No holes, no splits, just plain green ovals.
What went wrong?
Nothing is wrong with your plant. But something might be wrong with the soil.
What Splits Actually Are (and Why They Matter)
Those distinctive splits and holes in monstera leaves are called fenestrations. They're one of the main reasons people buy monsteras in the first place.
Here's the thing about fenestrations: they're a sign of maturity. A monstera only produces them when it's growing strongly and has enough energy to put out large, complex leaves.
Young monsteras and small plants almost never have splits. That's completely normal. The splits come later, when the plant is established and thriving.
The problem is when a plant stops developing splits even as it gets older. When new leaves keep coming in small and plain, even on a plant that should be mature enough to fenestrate. That's when the soil is worth looking at.
Why Root Health Drives Leaf Size
A monstera's roots are what fuel its growth. The more healthy, active root space a plant has, the more energy it can put into making big, complex leaves.
When roots are cramped or damaged, the plant goes into a kind of low-power mode. It keeps producing leaves, but small ones. Simple ones. Ones that cost less energy to make. The plant is essentially conserving resources because it doesn't have enough root power to do more.
Dense, compact potting mix causes this in two ways.
First, it limits how far roots can spread. Roots push through soil, and thick, heavy mix puts up a lot of resistance. Roots end up bunched and tangled instead of spreading through the pot.
Second, dense mix tends to stay wet. Roots need air just as much as they need water. Roots sitting in wet, airless soil for days at a time slowly weaken. They stop absorbing nutrients efficiently. The plant gets less of what it needs, even when you're watering and feeding regularly.
The result: smaller leaves, no splits, a plant that looks like it's stuck.
How to Tell If This Is Your Problem
Here's a quick way to check. When did you last repot your monstera, and what mix is it in?
If it's been more than two years and the plant is still in the mix it came with from the nursery, the mix has almost certainly compacted. Nursery mixes break down over time. A mix that started out reasonably open becomes denser and denser as the organic material inside it decomposes.
You can also check by sticking your finger into the soil. If it feels dense and packed rather than loose and crumbly, if it takes more than three or four days to dry out after watering, the mix is likely the problem.
The Fix: Open Up the Roots
Repotting into a chunkier mix gives roots room to breathe and spread. When roots can expand freely, the plant has more capacity to grow, and that growth shows up as bigger, more complex leaves.
The goal isn't a completely different pot size (going too large too fast can cause its own problems). The goal is a different mix. Something open and chunky that drains fast and gives roots plenty of air gaps to grow into.
A good approach is to mix roughly half standard indoor potting mix with half chunky pine bark. The bark creates permanent gaps in the mix that soil alone never could. Water drains through fast, air gets in, and roots have something firm and textured to grip onto as they spread.
Orchiata Orchid Bark is ideal for this. It's made from aged New Zealand pine bark, and it stays chunky for three to five years without breaking down and compacting the way cheaper bark does. For monsteras, the Classic (6-9mm) or Power (9-12mm) grades give a great result. The chunks are big enough to create real air space but small enough to blend well with a standard potting mix.
What Happens After You Repot
Be patient here. A monstera that's been stressed in bad soil doesn't immediately bounce back and start pumping out fenestrated leaves.
In the first few weeks, the plant adjusts to its new environment. You might not see much change at all. New roots are growing into the fresh mix, but you can't see that happening.
After four to six weeks, new growth usually picks up pace. The first new leaf after repotting might still be small, depending on how stressed the plant was before. The leaf after that should be bigger. And after that, bigger again.
Fenestrations tend to appear when leaves reach a certain size. So as leaf size increases with each new growth cycle, you'll eventually cross the threshold where splits start showing up.
It can take a few months. But once it starts, you'll see the pattern clearly.
Light Matters Too
It would be unfair not to mention light. Monsteras need reasonably bright, indirect light to grow strong leaves. A plant in a dim corner is going to produce smaller leaves no matter how good the soil is.
If your monstera is getting fewer than four to six hours of indirect light per day, move it closer to a window. Not in direct sun, which can scorch the leaves, but somewhere bright enough to read comfortably during the day.
Combined with a good chunky mix, adequate light is usually all it takes to get splits coming through on a healthy, established plant.
You're Probably Closer Than You Think
If your monstera has been alive for a year or more without splits, the plant is surviving. It just needs the conditions to thrive.
The good news is this is very fixable. A bag of quality bark, a fresh repot, and a bit of patience is often all it takes. The splits are in there. You just need to give the plant the root space to grow them.
